US444917A - mason - Google Patents

Description

(No Model) 3 Sheets-Sheet l.

A. J. MASON. WASHER PUNOHING MACHINE.

1 104 14317. Patented Jan. 20, 1891.

WITNESSES INVENTOR (No Model.) 3 SheetSSheet 2.

A. J. MASON. WASHER PUNUHING MACHINE.

No. 444,917. Patented Jan. 20,1891.

iii?

IN VENTOR m: NORRIS Runs 00., FHOTO-LITPKL, WASHINGYGN, n. c.

(No Model.) 3 Sheets-$heet 3. A. J. MASON. .WASHER PUNUHING MACHINE.

Patented Jan. 20, 1891.

Mxfi zu I .WEQM

INVENTOR WITNESSES 1 UNITED STATES PATENT FFICE.

AMOR J. MASON, OF NORRISTOXVN, PENNSYLVANIA, ASSIGNOR TO JAMES P.

. MASON, OF SAME PLACE.

WASHER-PUNCHING MACHINE.

SPECIFICATION forming part of Letters Patent No. 444,917, dated January 20, 1891.

Application filed July 25, 1890. derial No. 359,958. (No model.)

To all whom it may concern/.-

Be it known that I, AMOR J. MASON, a citizen of the United States, residing at Norristown, in the county of Montgomery and State of Pennsylvania, have invented certain new and useful Improvements in VVasher-Punching Machines; and I do hereby declare the following to be a sufficiently full, clear, and exact description thereof as to enable others skilled in the art to make and use the said invention.

This invention relates to machines for punching washers and similar forms having perforations therein from strips of metallic plate metal, and has for its object the economy of material by diminishing the amount of scrap, facility and certainty of accuracy in supplying or feeding metal to the machine, facility of changing the dies and punches to make different sizes without loss of time in making adjustment, certainty and rapidity of action in discharging the washers or other forms and the scrap, the automatic sorting of the washers from the scrap, better durability of the punches and dies, and facility of sharpenin g the dies and punches by grinding when worn without altering the sizes of the articlcs produced by them.

To accomplish these ends this invention consists in a machine constructed as hereinafter described, and shown in the accompanying drawings in which-- Figure 1 shows a side elevation thereof; Fig. 2, an end elevation thereof; Fig. 3, a top view thereof; Fig. 4, asection in the plane indicated by the dotted line so at in Figs. 2 and 3; Fig. 5,

an enlarged detached front View of the dies and central punches for the washers; Fig. 6, a central section through one of the dies and the central punches fitted thereto; Fig. 7, a detached view of the annular punches; Fig. 8, a central section of one of the annular punches; Fig. 9,a detached View of the mechanism for separating scrap from the washers; Fig. 0, a detached view of the guiding and feeding mechanism; Fig. 11, a detached view of the mechanism for discharging the washers from the dies; Fig. 12, a detached view of the mechanism for discharging the central scrap from the hollow punch and the stripper for discharging the scrap from between the annular punches; Fig. 13, the method of laying out or projecting the dies and punches for the best economy of material when an even number is used Fig. 14, the method of laying out or projecting the dies and punches for best economy of metal when an uneven number is used, and Fig. 15 the method of laying out dies for similar economy in a single line oblique to the direction of the motion of the sheet of metal as fed to the machine.

1 1 represent the side frames of the machine, held togethersidewise by ends or cross bars 2 2, which have flanges 3 3, embracing the ends of the side frames 1 1, and prevent ing them from spreading laterally.

Parallel with each of the side frames 1 1 are two wrought-metal bolts 4. a, which extend through the heads 2 2 and are provided with nuts 5 5, screwed upon their ends, thus holding the ends 2 2 in firm contact with the sides 1 1 and sustaining all tensile strains in the direction of the length of the machine, and, by avoiding any strain upon the side frames 1 1, leaving the frames unimpaired by springing in performing accurately their functions of guiding the disks and punches, as hereinafter described.

Through the centers of the frames 1 l is fitted in suitable bearings a shaft 6, bearing an eccentric '7, extending in the direction of the length of the shaft 6 the entire distance between the side frames 1 1. Fitted upon the eccentric 7 are boxes 8, which are fitted so as to slide vertically in slots 9 in the frame 8 5 10, so that the frame 10 is reciprocated hori-. zontally by the eccentric 7, the frame 10 being guided accurately between the side frames 1 1 and resting on the bottom slides 11, and held down in position by the caps 12, secured to the side frames 1 1, sliding smoothly and accurately between them. Through the frame 10 are openings in which are inserted crossbars 13, which are fastened to the side frames,

1 1, and have inclined surfaces against which 5 rest the keys 14. Upon the ends of the frame 10 are formed recesses or seats 15,into which fit the beds or chucks 16 for holding the dies 17. Corresponding recesses 18 are formedin. the end cross-bars 2 2, in which the loo punch-holders or beds 19 fit. In each of the end cross hars is a recess in which is fitted a plunger 21, reciprocated by a lever 22, pivotally connected thereto by abolt 23.

The machine being symmetrical, a description of the punches and dies and their adjuncts for one side or end of the machine suffices for both.

The lever 22 has at one end a fulcrum 24, formed on the end bars 2, and is operated from the other. end by a rod 25, adjnstably attached by screws 26 and nuts 27 to a yoke 28, which is reciprocated by a cam 29 on the shaft 6. In the end cross-bars 2 2 are-formed inclined grooves 31, in which fit correspondingly-inclined keys 32, vertically adjustable by means of screws 33, which keys bearing against the backs of the punch-beds 19, furnish; a means of adjusting them in the direction of the length of the stroke of the punches and thereby regulating the depth to which the punches may enter the dies.

The dies 34 are made in the form of a hollow cylinder with fiat ends and having a central. hole 35 in the bottom, in which fits a cylindric punch 36 for piercing the holes in the washers. A collar is formed on the back end, of the punch 36 and a corresponding; counterbore 37 is formed in the die to receive it, so

that the washers may not by sticking in the punch 36 pull it out of the die 34. A similar collar 38 is formed on the back of the die 34, which may fit ina corresponding counterbore inthe die-holder or bed 16 19, or may rest against the back of the die-holder 16 and insures the retention of the dies 34in the bed 19.

In the bottom of the die 34, between the central opening for the punch 36 and the cylindric inner surface, are several holes 39', through which rods 40 work freely and serve toexpel the washers from the die. The rods 40'ha;ve shoulders 41 to prevent them project'ing too far through the die 34, and are furnished with springs 42 to retract them and are thrust outward by the wedge 14.

The punch-bed 19 is rectangular in outer form and fits. accurately in a seat 18, formed in the cross-bar 2, being held down by the cap 43,. and may bev lifted out by an eyebolt screwed into a suitable opening in its upper side.

The punches 44 are hollow cylinders fitted in a chuck-plate 45, being held therein by a collar'46, formed on the back end of, each in the. chuck-plate 45. The chuck-plate 45 is fitted upon a rectangular chuck plate 19, which fits accurately in a recess 18, formed in the side ofthe cross-bars 2, and is held in place by a cap-plate 43, secured by screws 50. The plate 45 is attached to the chuck-plate 19 and heldin position by stead y-pins 51 (shown in lhg.v 12,) and when once fitted so that the punches 44 register with the dies 34 they remain together and are introduced and withdrawn from the machine by means of an eyebolt 52, so that whenasetof dies andpunches have been fitted they merely require to be lowered and clamped when required for subsequent use Without any trouble or labor of readjustment.

Through the center of each punch 44 is a plunger or rod 53, which expels the metal cut from the eye of the washer from the central cavity of the punch. The rod 53 is formed with a collar 54 upon the rear end and provided with a spring 55 to retract it, and is forced outwardly by the plunger 21, which can be adjusted so as to leave only so much of the rod 53 project beyond the face of the punch as is requisite to discharge the scrap.

The punches 44 are surrounded by a plate 56, which acts as a stripper in clearing off the scraps of metal intervening between the washers. 57, which are. fitted similarly to the rods 53, and are worked by the same plunger 21.

A stationary shear-blade 58 is securedto the frame 1, and a movable shear-blade.59-, workingagainst it, is secured to the frame 1, so as to be oscillated by the reciprocation of the frame 10 to cut into short pieces any scraps which might otherwise remain beyond the line of the outer row of washers in the sheet in the event of the plates being wider than was required. The cutting off of any-surplus metal into short scrap is important, because if left to project in a long strip it hinders the prompt feeding of the plate metal to the machine.

The dies and punches are arranged in the manner shown in Figs. 13 and 14, equidistantly in two vertical lines. The central distance which the punches and dies have between them is equal to the distance between the outer ends of the two radii of length equal to the diameter of the washer placed at an angle of one hundred and twenty degrees to each other, and the centers of the punches in the next line of holes are locatedso as to coincide with one' of the angles of. an equilateral triangle, the other angles-of which co-' incide with centers of punches in the first row.

In Fig. 13 there are shown two rows of punches, each equal in number. In Fig. 14 there are two rows, the second row containing one less than the first row. In Fig. 15 are shown three punch s or dies arranged in a single row oblique to the direction of the feeding motion which is indicated by the arrow. The extent of motion is indicated in the dotted circles.

Upon Figs. 13 and 14 are marked dotted circles equal in diameter to the size'of the washers. These circles indicate the positions which the washers occupy in the sheet metal, and it will be observed that the edges of the several circles are in contact with each other. A stop-pin 61 is placed on the-die so that the edge of the plate at the point at which the washer had been previously cut will touch the pin and leave no metal between it and the edge of the die. when the plate is forced against it. A gage-pin 62 is placed upon the This stripper-plate 56 is-secured to rods IIO a r r917 highest punch in the die which limits the height to which the plate may be raised.

Beneath a plate of metal is a supporting; and lifting plate 63, suspended adj ustably from a bolt 64 and nut 65 from a spring 66, (shown in Fig. 10,) one end of which is attached to a tin cap 43, and the free end 67 is inclined downward, so as to be raised by the end of the frame in advance of the dies reaching the plate, so that while the plate is free to move at intervals between each punching operation it is raised and pressed against the gage-pin (52 during each cutting operation of the punches. By this arrangement any excess of width of metal in the sheet occurs at the lower edge and is always within reach of the shear-blades 58 and 59 to be divided into short scraps.

The metal from which the washers are cut is presented in the form of wide strips or sheets by the hands of an attendant with the end foremost: and with the sides of the plate held perpendicularly and pushed into the space between the punches and dies from the front side of the machine, as shown in Fig. 1 of the drawings, until the end of the plate meets the pin (51 and with the lower edge of the plate resting on the lifting-plate (53. As the punches approach the dies, the spring 66 rises and carries with it the bolt 64:, nut (55, and plate (33, lifting the sheet of metal into contact with the gage-pin 62. The inward stroke of the punches to the dies being com pleted, the washers are severed from the plate and the central scrap cut from the eyes of the washers. On the returning or outward stroke of the punches from the dies the central scrap is expelled from the punches, as hereinafter I explained. It should be observed that the machine, as shown, is duplex and the opposite sides or ends act alternately, the outward stroke of one set of punches taking place at the same time as the inward stroke of the other set of punches.

The washers are expelled from the dies by the rods 40, operated by the wedge 14, and re tracted by the springs 42. By means of wedges 14 controlled by screws the dies 34 are adjusted to the length of the punches and by means of the wedges 32 the rods 53 are adjusted so that at every returning stroke the scrap is expelled from the center of the punches. The expulsion of the scrap takes place during the earlier part of the motion of the frame 10 and the expulsion of the washer during the later part of the motion.

In order to separate the washers from the scrap, a plate 71 (shown in Fig. 9) is placed upon an arbor 72 below the frame 1 l of the machine, and connected by a link 73 and lever 7 4 to the slide 10, so that when the scraps fall they are turned toward the center of the machine, and when the washers fall they'are directed toward the end of the machine. Power is applied by tootlrgearing to the shaft 6 in the manner usual with this class of machines.

It is obvious that the best economy of material is secured by using broad sheets of metal because of the Waste which is inevitable at the edges, and it is equally clear that other articles having similar forms-such as nuts-may be produced in like manner.

By reason of the true cylindric forms of the punches and dies they retain their diametral sizes when ground upon their faces to sharpen the cutting-edges and the machine is readily adjusted by the wedges 32 to such changes in length as ensue from this operation.

Having described my invention and the operation thereof, what I claim is- 1. In a machine forpunching washers from plate metal, the dies and punches, arranged in rows with intermediate spaces equal to the outer dimensions of the washer, to punch washers from the plate from the portion intermediate between previous punching to avoid waste, in the manner set forth, shown, and described.

'2. In a machine for punching washers from plate metal, the horizontally-reciprocating slide having dies attached thereto upon opposite ends thereof, in combination with opposed stationary punches supported endwise by adjustable keys resting upon the station- 9 ary frame, substant1ally as and for the purpose set forth.

In a machine for punchingwashers from plate metal, the horizontally-moving punches, each having a central aperture constructed and arranged to operate as a die, each in co inbination with a stationary die and each provided with a central punch supported upon adjustable keys to adjust the position of cutting and to compensate for wear, substantially as set forth.

4:. In a machine for punching washers from plate metal, the dies and punches arranged to telescope the one within the other, in combination with the discharging-rods resting upon adjustable keys for expelling the washers and scrap, substantially as set forth.

5. In a washer-punching machine, the combination of cylindric punches and dies, provided with a retaining-collar with a correspondingly-counterbored chuck adapted to fit recesses in the frame and sliding head of the machine, substantially as set forth.

6. In a washer-punching machine, the series of punches and dies telescoping with each other, as described, in combination with a guiding-plate reciprocating on a pivot for guiding and delivering the scrap and Washers in opposite directions, substantially as set forth.

7 In a washenpunching machine, the series ofdies and punches arranged in conjunction with the feeding devices, as described, to cut washers from a plate of metal so closely as to sever the scrap located between the Washers,

in eombinationwith a pair of shearing-blades diameter of the Washers, and thereby effect a 10 arranged to divide themarginal surplus metal severance of the scrap located between the of the sheet into short scrap, substantially Washers when such intermediate portion of as set forth. I plate is punched, substantially as set forth.

8. InaWasher-cuttin 'maohine the arran 'e- T ments of dies in series at such distances 1 AMOR MASON from each other that the plate intervening I between the contiguous die-apertures shall I include a circular space equal to the outer lVitnesses:

EDW. HAUGH, A. VAN WYoK BUDD.

Images